Air-suction crinkling apparatus



1 1927. May 3 K. WANDEL AIR SUCTION CRINKLING APPARATUS Filed March- 6, 1920 ?atented May 31, 1927.

This

crinkling paper by pressure to cause a web to STAT N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TO ARKELL NEW YORK,

N. Y., A CORPORATION OF NEW YORK.

AIR SUCTION CEINKLING APPARATUS.

Application filed March 6,

invention relates to apparatus the employment of dherencc of the paper drum preliminary to the crinkling o the clearing of the paper by a doctor or like abutment or other crinkle forming vention paratus me ans.

for

air

from the drum More particularly the inhas to do with a type of such apwhere the air pressure is pro by a suction box or like within the crinkling drum which is constituted therethrou'gh communica tion box as they move paratus as a hollow shell of this type as an objection and difficulty the fact that the air suction has been exerted through multiple through the shell constituting drum and these peripheral surface of of these drawn by enough against tendency crinkled paper.

present construction and crinkling drum whereby ported upon continuous and having in the duced device mounted with apertures ting with the sucthereovcr. hereto fore proposed In aphas arisen from series of holes the crinkling holes extending to the drum. the walls holes have produced multiple minute ledges or shoulders into which the paper is er is pi suction to a small extent but that as it engages the doctor s closely against the surface 'nched or caught holes in the invention is to provlde an improved taposition to such areas co areas adapted to hold, uniformly adherent to presenting ledges or catch paper.

in its broader aspect,

or cause tearing or the invention is not limited, to a drum which is Thus,

perforated and is provided suction the paper drum may box.

be produced in form of suction roll the paper is supareas of the drum on the supporting various ways not alternation w1th and in juxntinuous suction the paper closely and the drum but without shoulders that could pinching of the with an internal The air pressure which holds areas of the necessarily involving perforations 1n the tion formed tive edge,

engage stitute the invention als doctor presenting the serrations drum nor an internal suction box. In conith this construcincludes a specially a serrated operaor teeth of which and fit into the grooves that conthe continuous suction areas, The

through communicating 1920. Serial No. 363,709.

foregoing and other objects and advantages, of the invention will more fully appear from the following detailed description, and the distinctive features of novelty will be thereafter pointed out in the appended claims.

Referring to the drawings:

Fig. 1 is a diagrammatic longitudinal vertical section of a paper crinkling apparatus embodying the invention; Fig. 2 is a partial elevation with a part broken away in section on a larger scale showing a portion of the crinkling drum and of the doctor blade co-operative therewith; and

Fig; 3 is a partial transverse section on a still larger scale showing the essential working portions of the apparatus indicates a mounting for a roll of paper R from which the web W to be crinkled is supplied, this web being shown as led around an intermediate guide roll 11 to the crinkling drum 12, though this is merely illustrative and the paper might be drawn in a straight path from the roll to the drum. The paper web is however paper roll wholly by its ment with the crinkling drum due to the suction efiect to be presently described. The crinkling drum 12 is in the form of a'hollow shell with multiple perforations 12- therewith the mouth 13 of a suction box 13 as the'perforations pass over such mouth in the rotation of the drum. The drum 12 is mounted for rotation in a suitable housing 14 and may be driven in any suitable way (not shown). In the operation of the machine air suction to a requisite and predetermined degree is maintained in the suction box 13 by an air pump connection. or like suitable device (not shown). The paper is held closely and uni formly adherent to the drum with a pressure that may be determined as required by maintaining the requisite degree of air suction and while thus adhering to the drum it engages a doctor or clearer 15 which is mounted so that its operative edge is in proximity to the forward edge of the suction box mouth resulting in the crinkling of the paper to produce a crinkled web W which is led on to a take-on roll R mounted on suitable supports 16. In accordance with my invention the holes 12 are produced in spaced respective grooves 12 with the outer sides of such pro ections lying substantially flush with the surface of the drum as indicated at 17", these projections which thus constitute filling pieces'tei'minating in proximity to the rear .side of the suction box mouth. The path of the paper web W is such that it covers the portions of the grooves 12 from the doctor to the packing projections or filler pieces and thus a series of suction areas alternating with continuous surface supporting portions of the drum are prov ded. It is to be observed that these supporting surface portions of the drum are relatively'wider than the suction grooves 12 and these grooves are of a dimension such that the air suction will not draw the paper materially thereinto, it being understood that for the handling of thinner and lighter grades of paper these grooves will be relatively narrower than for heavier grades. In other words, the paper supporting areas act to hold the paper substantially out of the grooves. The doctor has its operativev edge bearing against the paper supporting areas 12 and is preferably equipped with a series of teeth or projections 15 which fit into the grooves 12 and serve the functionof co-operating to clear the paper from the drum without tearing or injuring the same even though it may be drawn to some small extent into the grooves 12. Such teeth may also be made to serve the function of closing the grooves 12 at the crinkling point so as v to prevent loss of the air suction from this direction, in the absence of other means to effect this result. Thus it is insured-that the paper will be cleared from the crinkling drum by the doctor without being caught or pinched against any ledge or obstruction until it is cleared off by the doctor and a perfect and satisfactory crinkled paper product is obtained. I am aware that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and I therefore desire the present embodiment to be considered in a l respects as illustrative and not restrictive, reference being had to the appended claims rather than to the foregoing description to inventlon.

hold indicate the scope of the.

Having described my invention, what I desire to secure by Letters by air suction, such equipment consisting in a series of circumferential grooves in the surface of the drum alternating with continuous circumferential paper supporting areas, said paper supporting areas acting to the paper substantially out of said grooves, said grooves having communication with a source of air suction.

2. Paper crinkling apparatus, comprising a crinkling drum having a doctor and a suction device co-operativetherewith, said drum presenting a series of continuous circumferential paper supporting areas alternating with a series of suction areas having communication with said suction device, said paper supporting areas acting to hold the paper substantially out of said suction- I areas.

3. Paper crinkling apparatus, com a crinkling drum having a doctor an a suction device associated therewith for causing adherence of the paper to the drum as it engages the doctor, said drum presenting a series of continuous circumferential paper supporting area's alternating with continuous suction grooves having communication with said sue ion device, the portions of such rising grooves in communication with said suction device being segregated from the remaining portionsthereof to prevent loss of air suction.

4. Paper crinkling apparatus, com rising a crinkling drum having a doctor an a suction device associated therewith for causing adherence of the paper Engages thedoctor,-said drum presenting a series of continuous circumferential paper supporting areas alternating with. continuous suction grooves having communication with said suction device adjacent the crinkling oint, said paper supporting areas acting to. 101d the (paper substantially out of said grooves, sai doctor having projections entering said grooves.

5. Paper crinkling apparatus, a crinkling 'drum havin a doctor and a suction device associate drum presenting continuous circumferential paper supporting areas alternating with suction grooves having communcation with said suction device in proximity to the crinklingpoint, said paper supporting areas acting to hold the paper substantially out of said grooves, and a packing device to segregate such portions' of said grooves from other portions thereof, said doctor having projections entering and fitting said grooves for the purpose stated.

to the drum as it.

comprising therewith," said 'tive with said drum,

6. In a paper erinkling apparatus, the combination of a perforated crinkling drum provided with circumferential grooves in the surface thereof alternating with circumferential paper supporting areas, said supportin areas acting to hold the paper substantia 1y out of said grooves, a doctor co operative with said drum, and a suction box locatedwithin saidcrinkling drum and communicating with said grooves to hold the paper on said supporting areas.

7. In a paper crinkling apparatus, the combination of a perforated crinkling drum provided with circumferential grooves in the surface thereof alternating with circumfercntial paper supporting areas, said su porting area acting to hold the paper substantially out of said grooves, a doctor cooperaa suction box located within said crinkling drum and communicating with said grooves" to hold the paper on said supporting areas, and means for segregating the portions of such grooves in communication with such suction box from the remaining portions thereof to prevent loss of air suction.

8. In a paper crinkling apparatus, the

combination ofa perforated crinkling drum provided with circumferential grooves in the surface thereof alternating with circumferential paper supporting areas, said sup-' porting areas acting to hold the paper substantially out of said grooves, a doctor cooperative with said drum, and a suction box located within said crinkling drum and communicating with said grooves to hold the paper on said supporting areas, said doctor having projections entering said grooves. In testimony whereof, I have signed my name to this specification.

' URT WANDEL. 

